This work aims to develop a highly e cient solar light-induced photocatalyst based on La Mn co-doped Fe 2 O 3 nanoparticles. Pure Fe 2 O 3 and La Mn co-doped Fe 2 O 3 nanoparticles were fabricated by a simple co-precipitation method. The photocatalysts were analyzed for their morphological, structural, and magnetic characteristics. The photocatalytic performance of the Fe 2 O 3 , La 0.1 Mn 0.3 Fe 1.60 O 3 , and La 0.2 Mn 0.2 Fe 1.60 O 3 catalysts was assessed by their capability to degrade Rhodamine B (RhB) under solar light illumination. La 0.2 Mn 0.2 Fe 1.60 O 3 displayed exceptional degradation performance, degrading RhB to 91.78% in 240 min, in comparison to La 0.1 Mn 0.3 Fe 1.60 O 3 (71.09%) and pristine Fe 2 O 3 (58.21%) under speci ed reaction conditions [(RhB) = 50 ppm; (catalyst) = 40 mg/L; pH = 7; T = 25 ºC)]. The increased photocatalytic performance of La 0.2 Mn 0.2 Fe 1.60 O 3 was attributed to the large surface area of the catalyst as a result of La Mn co-doping. RhB degradation was affected by changing pH, catalytic dosage, dye concentration and temperature. The degradation of RhB was found to be pseudo-1st order kinetics. The photocatalyst material exhibited exceptional stability in four consecutive cyclic runs. The excellent photodegradation potential of La 0.2 Mn 0.2 Fe 1.6 O 3 nanoparticles suggests that the effective eradication of organic pollutants can be achieved by these particles.